Top-prop nut



(No Model.) E. ROTHLISBBRGBR.

TOP PROP NUT.-

Nrrnn artt www@ ERNESTE BOTHLISBERGER, OF CINCINNATI, OHIO.

SPECIFICATION forming part of Letters Patent No. 313,771, dated March l0, 1885.

Application led April 25, 1884. (No model.)

To will whom, it 11i/ay concern:

Be it known that I, ERNnsTE ltoTHLIsBDR- GER, a citizen of the United States, anda resident of Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Carriage-Top- Prop Nuts, of which the following is a specilic ltion.

My invention relates to an improvement in prop-nuts for carriage-tops.

The object of my invention is to construct an ornamental leather-covered nut, which can` be quickly and cheaply made in dies, ornamentally iinished, and avoiding the necessity of sewing the leather covering on the nut, which is commonly done now.

Metallic covering nuts have hitherto been employed in some instances; but they are not as desirable as leather, first, because they are easily bent; and, second, because they are more apt to scale and do not wear as well.

Figure l represents a top plan view of afinished nut; Fig. 2, a bottom plan view of the same; Fig. 3, a central cross-section of the same; Fig. 4, a central ross-section of the leather covering, showing the iirst step in forming the saine. Fig. 5 is a bottom plan view of the finishing-plate. Fig. 6 is a cross-section of a modication of the same. Fig. 7 isaplanview of the modified nut shown in Fig. 6.

A represents the covering of my preferred form of nut.

B represents the screw-shank; b, the head, which' is preferably made convex for lightness, and filled out in oval form by means of a concave plate, c, as shown in Fig. 3. lThe nut B is made of any soft metal east in one piece and screw-threaded in the usual manner. The covering A is made of leather or other similar material first formed by dies into cup shape, as shown in Fig. 4.

e represents imitation stitches; a, the sides of 'the cup, the interior of which is made of the proper size to receive the headb of the metallic nut. rIhe cup is formed of a piece of leather cut in the proper shape and stretched by the dies into the shape and/form shown in Fig. 4. Vhen the screw Bb; together with the plate c, are inserted Within the flanges of the cup-shaped leather, then the edges or flanges c of the cup are turned over upon the under side Aof the head b, as represented by d, Fig. 3. This may be readily done by find is securely held in position by means of a ,u

metallic plate, C, which is formed with an annular series of downwardly-projecting tongs or pointed projeetions,i, formed on the pe riphery and stamped from a metal blank, and having an opening, C', so as to pass over the shank ofthe nut B when the tongs or points t' are forced down into the leather and securely hold the parts together.

A modification of the method of securing the parts together is shown in Figs. 6 and 7. This modification consists in forming tongs t upon the under side of the head b of thel nut, and the flanges d are forced down upon the under side ofthe head of the nut, the tongs t being forced into the fianges and holding them in position, thus dispensing with the plate C. Another modification would be to have the plate c made to extend beyond the periphery of the head of the bolt b, and with the tongs t formed upon the plate c, which would project downwardly between the sides oi' the cup a and the head b of the bolt into the leather [iange d.

Any desired configuration of the exterior may be formed by the dies.

The advantage of constructing the nut in this manner is that itmay be made as cheaply and quickly as when made fronrmetahand possessing all the advantages of the leathercovered and hand-sewed prop-nnt in general use. It can also be used for covering boltheads as well as for nuts.

I claiml. A prop -nut composed, substantially, of the nut B, having a lianged head, b, and the leather covering A a, having the overlapping flange d, turned upon the under side of the head b and secured by metallic projections, substantially as specified.

2. In combination with the leather covering A a, metallic nut B, having the fianged head b and downwardly-projecting tongs t, for securing the leather to the head, substantially as specified.

ERNESTE ROTHLISBERGER.

Witnesses A. GLUcHoWsItY, EDWARD BOYD. 

